voight



H. G. VOIGHT METHOD OF FORMING CASTINGS Mmh 12, 1935.

Filed Sept. 30. 1931 Bar/yd VoL'gizzf Patented Mar. 12, 1935 r UTED OFFIQE length with wire 36, as shown in Figures 3 and one to produce a satisfactory casting with the desired openings properly placed. Also, in every case the composition of the wire 36 should be similar to that of the molten metal poured, for it will be fused into and become a part of the casting as finally formed.

A moderate amount of practical experience by a capable foundryman in the use of this method will enable him to practice it successfully. The.

size of the wire 36 should be such that it will be completely fused by the action of the latent heat given off by the molten metal in solidification and at the-same time it should be sufficiently large to absorb enough of the heat to prevent the melting through of the pipe 26. The metal should remain molten until it has flowed evenly around the wire 36 and into the spiral areas 38, and the wire 36 should be so tightly wrapped about the pipe 26 that it will remain in place while this occurs. The entire operation then results in an even distribution of the chilling effect and a means whereby the latent heat will be distributed and utilized to fuse into a homogeneous mass the metal in the area wherein the pipe is placed.

,Inwinding the wire 36 around the pipe 26 care should be taken to see that the distances between the successive coils of the spiral are substantially equal and that the wire is so tightly wound that it will not be displaced by the first shock of the flowing molten metal.

It will readily be understood that the invention could be practiced by securing separate coils 40, as shown inFigure 5, around the pipe 26 at approximately equal distances therealong, and that the pipe itself might be formed of, various refractory materials; and it is to be understood that I do not wish to be limited by the exact embodiment of the method as shown in the attached drawing, which is merely by way of illustration and not limitation, as various and other uses of the method will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim:

1. Means for forming a channel in a metallic casting comprising, a metallic tube, and spaced separate metallic coils wrapped around said tube for fusing with the casting.

. 2. A metallic apertured core for use in casting an articleof manufacture, having metallic winding thereon adapted to provide protecting means for said core when said'article is being cast.

3. An apertured core for use in casting an article of manufacture, having a helical fusible winding thereon adapted to provide protecting means for said core when said article is being cast. a 7

4. An apertured core for use in castingan article of manufacture, having a fusible winding thereon comprising spaced separate coils adapted to provide protecting means for said core when said article is being cast.

' 10 5. A metallic apertured core for use in casting an article of manufacture, having a metallic helical winding thereon adapted to provide protectingv means for said core when said articlev is being cast.

6. A metallic apertured core for use in casting an article of manufacture, having a metallic fusible winding thereon adapted to provide protecting means for said core when said article 20 is being cast comprising spaced separate coils.

'7. A metallic apertured core for use in casting an article of manufacture, having a metallic windingrthereon adapted to provide protect;

ing means for said core when said article being cast comprising spaced separate coils.

an article of manufacture, having a helical winding thereon adapted to provide protecting means 2.25 8. A. metallic apertured core for use in casting,

for said core when said article is being cast, the

distances between successive coils being equal.

9. A metallic apertured 'core for use in cast- 10. The method of forming a casting includ-f ing those steps which comprise placing afus-' ible winding on a hollow metallic core, fixing said core and winding in a mold, pouring molten metal into said mold and absorbing substantially the heat of the molten metal adjacent said core in said winding whereby said core is protected. 1 1 a a 11. The method of forming a casting including those steps which compriseplacinga 'fusi-V ble winding on a hollow metallic core, fixing said core and winding in a mold, pouring molten metal of the same character as said winding into' 7 said mold and absorbing substantially theheat of the molten metal adjacent said core in said winding whereby said core is protected.

12. The method of imbedding a hollow me-' tallic core .in a casting to provide a, channel therethrough, which includes spacing metallic means substantially uniformly alongsaid core,

fixing said core and winding in a mold, pouring molten metal into said mold andabsorbing sub:

stantially the heat of the molten metal adjacent said core in said means whereby said core is protected.

HARRY G. VOlIGI-IT. 

